Method of dyeing hanks



May 25 1926.

. P. MISSY METHOD OF DYEING HANKS Filed Sept. 2, 1925 ave/2201"; @761!27M m4 C dma/ Patented May 25, 1926.

UNITED STATES PAUL MISSY, OF KREFELD, GERMANY.

METHOD OF DYEING HANKS.

Application filed September 2, 1925. Serial No 54,088.

This invention relates to a method of dyeing llilnkSrOf yarn by means ofdeveloping dyes, vat dyes. sulphur dyes and so on.

In the vat-dyeing of hanks of yarn it is "ery difficult, as is wellknown, to obtain uniformity in the colouring. One reason for this is thevery non-uniform penetration of the hanks in the vats, particularly inthe case of solid yarns. This lack of uniform distribution of liquorwithin the mass of yarn is accentuated upon wringing, so that insubsequent development or oxidation, the yarn is found. to be thoroughlynon-uniform.

The principal objectof this invention is to provide a method of dyeingwhich obviates the known disadvantages.

A further object is to provide a dye-spraying method involving thespraying of the dye on to the hanks simultaneously from opposite sides.whereby a thoroughly uniform penetration is achieved.

It has been proposed to spray wetting agents on to fabrics in order tosecure a more uniform distribution than is possible by dipping. However,the mere spraying of dye liquors on to hanks suspended freely overrollers and moving with the latter would not of itself achieve a uniformcolouring.

The invention provides for the employment of opposed jets or sprays ofliquor so that the hank is struck simultaneously from opposite sides andunder such pressure that not only is superficial penetration assured butthe matting together of the separate yarns in the wet hank is brokendown or destroyed so that a loosening of the hank is achieved. Thus.whereas there is a natural tendency for matting to take place owing tothe capillary attraction between the wet yarns, this matting is avoidedand the hank' is loosened by the force of the opposed jets which aredirected to the same point inside and outside of the loosely hanginghank. Spraying the hank upon portions which lie upon the roller does notachieve the object aforesaid as the hank cannot alter its cross sectionat this resting place and the separate yarns cannot deform or move.

The annexed drawing is a diagrammatic illustration of one convenient andpractical mode of carrying out the method.

The hanks are suspended from a plurality of revolving rollers a andbeneath the level of the latter there is a series of spray tubes 6 b.Thespray tubes 6 are disposed immediately beneath respective rollers aso that they lie within the loops of the suspended hanks, whereas thespray tubes 1) are disposed intermediately so that they lie between andoutside of the hanks. The spray nozzles or perforations of the tubes 6 bare disposed by any practical mechanical means, and this 1s ofparticular importance when considering developing dyes. No longer is itnecessary to remove the goods from the rollers for the oxidation. forafter uniform impregnation the hanks are allowed to remain hanging fromthe rollers which continue to revolve until the dyeing is completed bydevelopment or oxidation. Washing can then be effected immediately andwith the same a'pparatus.

This invention effects a considerable saving in dye, labour, steam andwater. For example, the quantity of dye liquor is reduced to one fifth.There is a saving of about 50% of the dye required and a saving of aboutof the steam required for heating the liquor. Finally, the saving ofwashing water is about four fifths of that heretofore required. As.compared with hand dyeing by the development process a saving of fivesixths of the time is effected.

The invention is of particular importance forthe uniform dyein ,of bulkymaterial such as Sirius silk, arti cial horse hair, and viscous silk.Moreover, hanks of very fine cotton yarn can be uniformly dyed, whereaswith known methods this is not possible on account of the capillaryaction causing the fine yarns in the wet condition to mat together andform solid hanks which are difficult to penetrate with uniformity.

I claim v 1. Method of dyein'r hanks of yarn comprising suspension oFthe hanks from rotating rollers and spraying hanging parts of the hanksby opposed jets substantially as set forth.

2. Method of dyeing hanks of yarn comprising suspension of the hanksfrom rotating rollers and spraying hangingparts of the hanks by opposedjets, the force of the jets being calculated so as to be effective forloosening the texture of the sprayed portions of the hanks substantiallyas set forth.

3. Method of dyeing a hank of yarn comprising suspension of the hankfrom a rotary roller, and the simultaneous employment of opposed sprayjets within and without the hank substantially as set forth.

4. Method of dyeing a hank of yarn consisting in suspending the hankfrom a rotating roller, spraying dye liquor simultaneously on to theinside and outside of a hanging part of the hank by opposed spray jets,continuing to revolve the roller after the cutting 011 of the jets whencomplete impregnation of the hank has been effected,

and finally washing the hank whilst it continues to be moved by therotating roller substantially as set forth. 7

5. Method of dyeing hanks of yarn consisting in sus ending a number ofhanks from a plura ity of rollers, spraying dye liquor simultaneously onto the inside and outside of hanging parts of the hanks by opposed sprayjets some of which are situated within the hanks and some of which aresituated between the hanks, and finally performing finishing steps uponthe hanks whilst they remain suspended from the rollers after thecompletion of the impregnation by spraying substantially as set forth.

PAUL MISSY.

